Posts under System.
A concrete walkthrough into Linux stack overflow protections — how canaries, NX, ASLR, PIE, and RELRO actually work, what they stop, what they don't, and what breaks when you enable them.
A detailed look at the system calls behind malloc — brk/sbrk for heap growth, mmap for large allocations and thread arenas, and the internal kernel data structures for process memory.
A walkthrough into how Linux dynamically links shared libraries at runtime — PIC, GOT, PLT, lazy binding, gdb tracing, and the real cost of -fPIC.
A concrete walkthrough into Linux glibc (ptmalloc2) heap memory management — arenas, chunks, bins, tcache, and how each structure becomes an attack surface.
A concrete guide to Linux cgroups — from V1's multiple hierarchies to V2's unified model, with real gotchas for CPU throttling, OOM behavior, and production debugging.
Understand ELF files from sections and segments to relocations and dynamic linking, with concrete examples for debugging Linux binaries and loader issues.
All posts in reverse chronological order.
A concrete walkthrough into Linux stack overflow protections — how canaries, NX, ASLR, PIE, and RELRO actually work, what they stop, what they don't, and what breaks when you enable them.
A detailed look at the system calls behind malloc — brk/sbrk for heap growth, mmap for large allocations and thread arenas, and the internal kernel data structures for process memory.
A walkthrough into how Linux dynamically links shared libraries at runtime — PIC, GOT, PLT, lazy binding, gdb tracing, and the real cost of -fPIC.
A concrete walkthrough into Linux glibc (ptmalloc2) heap memory management — arenas, chunks, bins, tcache, and how each structure becomes an attack surface.
A concrete guide to Linux cgroups — from V1's multiple hierarchies to V2's unified model, with real gotchas for CPU throttling, OOM behavior, and production debugging.
Understand ELF files from sections and segments to relocations and dynamic linking, with concrete examples for debugging Linux binaries and loader issues.
Understand calling conventions, stack frames, call/ret behavior, debugging observation, and security implications from the assembly view.